Climate and monthly weather forecastLlanelli, United Kingdom
Climate and monthly weather forecast
Weather in January
January, the same as December, in Llanelli, United Kingdom, is a frosty winter month, with an average temperature varying between 4.7°C (40.5°F) and 7.8°C (46°F). The advent of January reveals an average high-temperature of a still chilly 7.8°C (46°F), showing minimal difference from the prior month. Weather in January »Weather in February
The last month of the winter, February, is another chilly month in Llanelli, United Kingdom, with an average temperature ranging between min 4.5°C (40.1°F) and max 7.7°C (45.9°F). February tends to be the coldest month, with temperatures averaging a daily high of 7.7°C (45.9°F) and a low of 4.5°C (40.1°F). Weather in February »Weather in March
The first month of the spring, March, is still a chilly month in Llanelli, United Kingdom, with an average temperature ranging between min 4.6°C (40.3°F) and max 9.3°C (48.7°F). Llanelli commences March with an average high-temperature of a still frosty 9.3°C (48.7°F), maintaining a close resemblance to the previous month. Weather in March »Weather in April
April is a fresh spring month in Llanelli, United Kingdom, with an average temperature ranging between min 6.3°C (43.3°F) and max 11.8°C (53.2°F). The shift into April finds Llanelli at an average high-temperature of a fresh 11.8°C (53.2°F), closely comparable to March's conditions. Weather in April »Weather in May
The last month of the spring, May, is a mild month in Llanelli, United Kingdom, with an average temperature ranging between max 13.9°C (57°F) and min 8.7°C (47.7°F). May's arrival shows an average high-temperature of a mild 13.9°C (57°F), hardly different from the previous month. Weather in May »Weather in June
The first month of the summer, June, is an enjoyable month in Llanelli, United Kingdom, with an average temperature varying between 11.1°C (52°F) and 16.4°C (61.5°F). The beginning of June reveals an average high-temperature of a comfortable 16.4°C (61.5°F), showing minimal deviation from the previous month. Weather in June »Weather in July
July, like June, in Llanelli, United Kingdom, is another refreshing summer month, with an average temperature ranging between min 13.1°C (55.6°F) and max 17.8°C (64°F). Llanelli reaches its highest average temperatures in July, measuring 17.8°C (64°F) at the peak and 13.1°C (55.6°F) at the lowest. Weather in July »Weather in August
The last month of the summer, August, is also an enjoyable month in Llanelli, United Kingdom, with an average temperature ranging between max 17.5°C (63.5°F) and min 13.6°C (56.5°F). Llanelli's August showcases an average high-temperature of a still comfortable 17.5°C (63.5°F), hardly distinct from July's 17.8°C (64°F). Weather in August »Weather in September
September, the first month of the autumn in Llanelli, is still a comfortable month, with an average temperature fluctuating between 16.4°C (61.5°F) and 11.9°C (53.4°F). Llanelli's transition from August to September introduces an average high-temperature of a still comfortable 16.4°C (61.5°F), marking an insignificant variation from the 17.5°C (63.5°F). Weather in September »Weather in October
October, like September, is another mild autumn month in Llanelli, United Kingdom, with temperature in the range of an average high of 13.9°C (57°F) and an average low of 10.3°C (50.5°F). Shifting into October, Llanelli records an average high-temperature of a still refreshing 13.9°C (57°F), presenting minor fluctuations compared to the previous month. Weather in October »Weather in November
November, the last month of the autumn in Llanelli, is also a fresh month, with an average temperature varying between 10.5°C (50.9°F) and 7.6°C (45.7°F). November sees a slight reduction in average high-temperature, with a shift from a refreshing 13.9°C (57°F) in October to a cool 10.5°C (50.9°F). Weather in November »Weather in December
December, the first month of the winter in Llanelli, is still a chilly month, with temperature in the range of an average high of 8.7°C (47.7°F) and an average low of 6.1°C (43°F). December brings a marginal elevation to a chilly 8.7°C (47.7°F) from November's 10.5°C (50.9°F) in Llanelli's average high-temperatures. Weather in December »Updated: Feb 8, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January, August, October through December, with an average relative humidity of 85%, are most humid months in Llanelli, United Kingdom.
In Llanelli, during the entire year, the rain falls for 219.6 days and collects up to 745mm (29.33") of precipitation.
January through March and December are months with snowfall.
In Llanelli, during the entire year, snow falls for 3.9 days and aggregates up to 20mm (0.79") of snow.
The month with the least sunshine is January, with an average of 3.7h of sunshine.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Llanelli, United Kingdom.
With an average high-temperature of 7.7°C (45.9°F) and an average low-temperature of 4.5°C (40.1°F), February is the coldest month in Llanelli.
March is the month with the coldest seawater in Llanelli, with an average sea temperature of 8.3°C (46.9°F).
The least humid month is April, with an average relative humidity of 81%.
In Llanelli, snow does not fall in April through November.
The months with the most sunshine are April and May, with an average of 8.2h of sunshine.
The month with the least rainfall in Llanelli is May, when the rain falls for 15.9 days and typically collects 37mm (1.46") of precipitation.
May through September, with an average maximum UV index of 4, are months with the highest UV index.
With an average of 16h and 36min of daylight, June has the longest days of the year in Llanelli.
The warmest period tends to be July, when average temperatures fluctuate between a high of 17.8°C (64°F) and a low of 13.1°C (55.6°F).
August is the month with the warmest seawater in Llanelli, with an average sea temperature of 16.8°C (62.2°F).
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time ends, and the time zone changes from BST to GMT. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 1:00 am, and the time zone reverts from GMT to BST.
December is the month with the most rainfall. Rain falls for 21.5 days and accumulates 84mm (3.31") of precipitation.
December is the month with the most snowfall in Llanelli, United Kingdom. Snow falls for 0.9 days and accumulates 8mm (0.31") of snow.
December has the shortest days of the year in Llanelli, United Kingdom, with an average of 7h and 54min of daylight.
Average temperature
Llanelli, United Kingdom
The warmest month (with the highest average high temperature) is July (17.8°C).
The month with the lowest average high temperature is February (7.7°C).
The month with the highest average low temperature is August (13.6°C).
The coldest month (with the lowest average low temperature) is February (4.5°C).
Average pressure
Llanelli, United Kingdom
- Average pressure in January:
1013.7mbar - Average pressure in February:
1013.1mbar - Average pressure in March:
1015.2mbar - Average pressure in April:
1015.2mbar - Average pressure in May:
1016.7mbar - Average pressure in June:
1015.9mbar
- Average pressure in July:
1015.1mbar - Average pressure in August:
1014.5mbar - Average pressure in September:
1016.6mbar - Average pressure in October:
1014.3mbar - Average pressure in November:
1009.7mbar - Average pressure in December:
1013.6mbar
The month with the highest atmospheric pressure is May (1016.7mbar).
The month with the lowest atmospheric pressure is November (1009.7mbar).
Average wind speed
Llanelli, United Kingdom
- Average wind speed in January:
23km/h - Average wind speed in February:
23.3km/h - Average wind speed in March:
20.1km/h - Average wind speed in April:
16.8km/h - Average wind speed in May:
16.2km/h - Average wind speed in June:
15.4km/h
- Average wind speed in July:
15.8km/h - Average wind speed in August:
17.2km/h - Average wind speed in September:
18.1km/h - Average wind speed in October:
20.2km/h - Average wind speed in November:
22.6km/h - Average wind speed in December:
23.9km/h
The windiest month (with the highest average wind speed) is December (23.9km/h).
The calmest month (with the lowest average wind speed) is June (15.4km/h).
Average humidity
Llanelli, United Kingdom
The months with the highest relative humidity are January, August, October, November and December (85%).
The month with the lowest relative humidity is April (81%).
Average rainfall
Llanelli, United Kingdom
The wettest month (with the highest rainfall) is December (84mm).
The driest month (with the least rainfall) is May (37mm).
Average rainfall days
Llanelli, United Kingdom
- Average rainfall days in January:
20.1 days - Average rainfall days in February:
15.8 days - Average rainfall days in March:
16 days - Average rainfall days in April:
15.1 days - Average rainfall days in May:
15.9 days - Average rainfall days in June:
17.8 days
- Average rainfall days in July:
19.4 days - Average rainfall days in August:
21.2 days - Average rainfall days in September:
17.5 days - Average rainfall days in October:
18.7 days - Average rainfall days in November:
20.6 days - Average rainfall days in December:
21.5 days
The month with the highest number of rainy days is December (21.5 days).
The month with the least rainy days is April (15.1 days).
Average snowfall
Llanelli, United Kingdom
The month with the highest snowfall is December (8mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days
Llanelli, United Kingdom
- Average snowfall days in January:
1.3 days - Average snowfall days in February:
1.2 days - Average snowfall days in March:
0.1 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.3 days - Average snowfall days in December:
0.9 days
The month with the highest number of snowfall days is January (1.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature
Llanelli, United Kingdom
The best month for swimming (with the highest average sea temperature) is August (16.8°C).
The coldest month (with the lowest average sea temperature) is March (8.3°C).
Average daylight / Average sunshine
Llanelli, United Kingdom
- Average daylight in January:
8h and 24min - Average daylight in February:
10h and 0min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 54min - Average daylight in May:
15h and 42min - Average daylight in June:
16h and 36min
- Average daylight in July:
16h and 6min - Average daylight in August:
14h and 36min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 42min - Average daylight in November:
8h and 54min - Average daylight in December:
7h and 54min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in January:
3h and 42min - Average sunshine in February:
3h and 54min - Average sunshine in March:
6h and 0min - Average sunshine in April:
8h and 12min - Average sunshine in May:
8h and 12min - Average sunshine in June:
7h and 54min
- Average sunshine in July:
7h and 54min - Average sunshine in August:
7h and 30min - Average sunshine in September:
7h and 0min - Average sunshine in October:
4h and 30min - Average sunshine in November:
4h and 6min - Average sunshine in December:
3h and 48min
The months with the most sunshine are April and May (Average sunshine: 8h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Llanelli, United Kingdom
- Average sunshine days in January:
7.8 days - Average sunshine days in February:
9.6 days - Average sunshine days in March:
12.3 days - Average sunshine days in April:
12.6 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
9.1 days
- Average sunshine days in July:
9 days - Average sunshine days in August:
6.5 days - Average sunshine days in September:
9.7 days - Average sunshine days in October:
8.6 days - Average sunshine days in November:
7.6 days - Average sunshine days in December:
7 days
The month with the most sunshine days is May (12.8 days).
The month with the least sunshine days is August (6.5 days).
Average UV index
Llanelli, United Kingdom
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Llanelli, United Kingdom
The month with the most cloud cover is December (Cloud cover 63).
The months with the least cloud cover are April and May (Cloud cover 46).
Average visibility
Llanelli, United Kingdom
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
